{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{5}{S[table-format=1.3]S[table-format=1.3]S[table-format=1.3]S[table-format=1.3]S[table-format=1.3]}}
\toprule
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}\\
                    &\multicolumn{1}{c}{\specialcell{Choose Your \\ Dictator Game}}&\multicolumn{1}{c}{\specialcell{Dictator \\ Game}}&\multicolumn{1}{c}{\specialcell{Trust \\ Game 1}}&\multicolumn{1}{c}{\specialcell{Trust \\ Game 2}}&\multicolumn{1}{c}{\specialcell{Social \\ Proximity}}\\
\midrule
\midrule
Sample mean         &      0.5740         &      0.3591         &      0.3984         &      0.3804         &      0.5481         \\
Sample standard deviation&    (0.4945)         &    (0.2490)         &    (0.2670)         &    (0.2477)         &    (0.2575)         \\
\midrule\multicolumn{4}{l}{\textit{Panel A: Average hydrocortisone effect$^a$}} \\ \quad Hydrocortisone effect&                     &-0.0156$^{*}$         &-0.0225$^{**}$         &     -0.0104         &      0.0123         \\
                    &                     &    (0.0093)         &    (0.0093)         &    (0.0095)         &    (0.0099)         \\
\midrule \multicolumn{4}{l}{\textit{Panel B: Average political coalition effect$^b$}} \\ \quad Political coalition effect&0.0415$^{***}$         &0.0097$^{**}$         &0.0199$^{***}$         &     -0.0005         &0.0536$^{***}$         \\
                    &    (0.0061)         &    (0.0038)         &    (0.0044)         &    (0.0027)         &    (0.0044)         \\
\midrule\multicolumn{4}{l}{\textit{Panel C: Interaction of hydrocortisone and political coalition$^c$}} \\ \quad Interaction effect&     -0.0094         &      0.0026         &-0.0197$^{**}$         &      0.0048         &     -0.0054         \\
                    &    (0.0116)         &    (0.0070)         &    (0.0083)         &    (0.0052)         &    (0.0084)         \\
\midrule Participants&     {1,784}         &     {1,784}         &     {1,784}         &     {1,784}         &     {1,784}         \\
Decisions per participant&         {6}         &         {6}         &         {6}         &        {30}         &         {4}         \\
Decisions           &    {10,704}         &    {10,704}         &    {10,704}         &    {53,520}         &     {7,136}         \\
\bottomrule
\multicolumn{6}{p{0.93\hsize-10pt}}{\footnotesize \textit{Notes}: $^a$ The average hydrocortisone effect is calculated as in equation~\eqref{eqn: Calculated Hydro Effect}. $^b$ The average coethnicity effect is calculated as in equation~\eqref{eqn: Calculated Coethnity Effect}. $^c$ The interaction effect is given by $\hat{\beta}_3$ in equation~\eqref{eqn: Main Specification}. All terms are described in the text. In this specification, we control for the interaction of a same-gender and same-age group indicator with hydrocortisone as well as gender, age group and ethnicity fixed effects of both players. The sample mean and standard deviation for the choose your dictator game refer to the share of decisions in which an in-group member was chosen among the decisions where one was available. Social proximity refers to the average measures of likelihood to be friends, trust and closeness rescaled to lie between 0 and 1. As an alternative in-group definition we employ the 2007 political coalitions of Kikuyu and Kamba versus Luo and Luhya.  Standard errors clustered at the participant level are reported in parentheses. Significance is denoted by \sym{*} \(p<0.1\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\).}\\
\end{tabular}
}
